diff options
Diffstat (limited to 'src/southbridge/amd/sb700')
| -rw-r--r-- | src/southbridge/amd/sb700/sb700_enable_usbdebug.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/src/southbridge/amd/sb700/sb700_enable_usbdebug.c b/src/southbridge/amd/sb700/sb700_enable_usbdebug.c index 0f40d862a7..02d3900047 100644 --- a/src/southbridge/amd/sb700/sb700_enable_usbdebug.c +++ b/src/southbridge/amd/sb700/sb700_enable_usbdebug.c @@ -2,6 +2,7 @@ * This file is part of the coreboot project. * * Copyright (C) 2010 Advanced Micro Devices, Inc. + * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -25,22 +26,39 @@ #define EHCI_BAR_INDEX 0x10 /* TODO: DBUG_PRT[31:29] */ #define EHCI_DEBUG_OFFSET 0xE0 /* Hardcoded to 0xE0 */ -/* Required for successful build, but currently empty. */ +#define EHCI_EOR (EHCI_BAR + 0x20) +#define DEBUGPORT_MISC_CONTROL (EHCI_EOR + 0x80) + void set_debug_port(unsigned int port) { - /* TODO: Allow changing the physical USB port used as Debug Port. */ + u32 reg32; + + /* Write the port number to DEBUGPORT_MISC_CONTROL[31:28]. */ + reg32 = read32(DEBUGPORT_MISC_CONTROL); + reg32 &= ~(0xf << 28); + reg32 |= (port << 28); + reg32 |= (1 << 27); /* Enable Debug Port port number remapping. */ + write32(DEBUGPORT_MISC_CONTROL, reg32); } +/* + * Note: The SB700 has two EHCI devices, D18:F2 and D19:F2. + * This code currently only supports the first one, i.e., USB Debug devices + * attached to physical USB ports belonging to the first EHCI device. + */ static void sb700_enable_usbdebug(unsigned int port) { - device_t dev = PCI_DEV(0, 0x13, 5); /* USB EHCI, D19:F5 */ - - /* Select the requested physical USB port (1-15) as the Debug Port. */ - set_debug_port(port); + device_t dev = PCI_DEV(0, 0x12, 2); /* USB EHCI, D18:F2 */ /* Set the EHCI BAR address. */ pci_write_config32(dev, EHCI_BAR_INDEX, EHCI_BAR); /* Enable access to the EHCI memory space registers. */ pci_write_config8(dev, PCI_COMMAND, PCI_COMMAND_MEMORY); + + /* + * Select the requested physical USB port (1-15) as the Debug Port. + * Must be called after the EHCI BAR has been set up (see above). + */ + set_debug_port(port); } |